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Abstract

This study demonstrates the contrasting mechanisms of landslides in adjoining hills with permeable (sandstone) and impermeable (mudstone) bedrock in the Boso Peninsula. The characteristics of slope hydrology were inferred from pressure-head monitoring and rainfall-runoff observations. An analysis of slope stability provided critical conditions for several previously occurring landslides. This study also postulates that the difference in the landslide mechanisms account for varying hill morphologies in this region